Stereopticon.



W. M. FISCHBACH.

STEREOPTICDNQ APPLICATION FILED JULY 1. 1914.

Patented June 8, 191,5.

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STEREOPTICON.

- APPLICATION FILED JULY 1, 1914.

1,142,158. PatentedJune 8, 1915.

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STEREOPTIQON.

APPLICATION FILED JULY I. I9I4.

Patented June 8, 1915.

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STEREOPTICON.

APPLICATION FILED JULY 1, 1914.

Patented June 8, 1915.

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WALTER M. FIS CHBACH, OF MILWAUKEE, WISCONSIN.

STEREOZPTICON.

To all whom it may concern Be it known that I, \VALTm: M. FISCH- EACH, a citizen .of the United States, and

- changing apparatus embodying a carrier in which the slides are readily accessible.

Figure 1 of the drawings represents a front elevation of a stereopticou and an automatic slide changing apparatus therewith in accordance'with my invention; Fig. 2, a

plan view of the same, the lantern of the stereopticon being partly in horizontal sectionpFig. 3, a plan view of afragment of the slide-changing apparatus partly in horizontal section, the'view being indicated by line 3- -3 in Fig. 1; Fig. 4*, aplan View of a rotary carrier element of said apparatus and parts therewith inverted; Fig. 5,'a front elevation of a fragmentof said apparatus partly in section. and in connection with the stereopticon; Fig. 6, a cross-section view indicated by line 5-5 in Fig. 5; Fig. 7, a sectional view ota crosshead element of said apparatus; Fig.8, a plan view of the'crosshead inverted and having pivotal plates therewith swung out of normal position; Figs. 9 and 10, side elevations of gear-arms of said apparatus. and Fig. 11,21, sectional view of a detail of said apparatus, the same being indicated by line l1-11 in Fig. 1.

Referring by numerals to the drawings, 12 indicates a stcreopticon lantern having the front thereof provided with upper and lower slide-guides 13, 14, the lower guide being shown extendedin one direction beyond said lantern.

F astcned to the front frame of the lan-, tern. by screws 15 or otherwise. is a rear of a guide-bar upper horizontalfiange 16 supported on a 16 having an end thereof Specification of letters-Patent.

e Patented une 8, 1915;

Applicationfiled July 1, 1914. Seria1N0.848,513. ,i

post-extension 17 of a standard 17 that is rigid on a base-plate 18,.said post-extension and the lower end of the standard serving as bearings for a vertical shaft 19.

Reciprocative in the guide-bar 16 is a head 20 of a traveler that alsoembodies a bar 21 having depending end fingers Q2 and an intermediate depending web 23 that is fashioned to clear the upper slide-guide 13 of the lantern and provided with an inner stoprib 24. Coupled to the traveler-head, by a screw 25 extending through a spacing-sleeve E26, one end ofa pitman 27, and the other end of the pitinan is coupled, by ascrew or pin 28, to a crank 29 fast on the upper end of the shaft 19, a spacing-washer 30 being arranged on said screw or pin between said pitman and crank. Each finger 22 of the traveler is provided with a right-angle notch matching an upper corner of a lantern slide or shutter movable in the guides aforesaid, and one of said lingers is shown provided with a clamp 31 that grips upon a permanent lanternslide or shutter for which the lower guide 14 on the lantern is extended I as aforesaid.

Loose on the post-extension 17 of the standard 17 is a hub 32 having ball-bearing on a shoulder 17 of said standard, and fastened to a flange 32. of the hub is a horizontal circular plate 33 having its upper side provided with a series of regularly spaced radial, grooves, and the underside of the plate is provided with a corresponding series' of grooves between radial ribs 33 thereof. Centered on the plate 33, rigid therewith, is a hollow conical crown 34:, having a base of less diameter than said plate. The wall of the crown is provided at regularintervals with slots that communicate -W1tll the upper grooves of the plate 33.

The plate 33 and conical crown 34 there open to the mouth of the'lower slide-guide 14 of the lantern. The guard 36 is attached guard being 'with constitute a carrier for lantern-slides to legs 37 fastened to a base 38 upon which the lantern and the plate 18 aforesaid are mounted.

The baseplate 18 is provided witlr other standards 39 and 40. A horizontal arbor -11 has its bearing in the upper-end of the standard 39 and a worm-wheel 42, fast on the arbor, is in mesh with a worm 43 fast on a shaft 14 for which the plate 18 is provided with hearing standards 15, and a pulley 46 fast on said shaft is in belt connection with another pulley 47 fast on the shaft of an electric-motor 48 that is mounted on the base 38, controlled by a switch 49 in the motor circuit.

Fast on one end of the arbor is the hub of gear-arms 50, 51, and fast on the other end of said arbor is the hub of a single gear-arm 52. The gear-arms 50, 51, act successively upon a bevel-gear pinion 53 fast on the ver-,

tical shaft 19 to effect a reciprocation of the traveler aforesaid, and the gear-arm 52 acts upon a bevel-gear-pinion 5e fast on another vertical shaft 55', for which the standard 40 is provided with bearings. The disposition of the gear-arms is such that the one 52 has action in the interval between the action of .the others 50 and 51, whereby when either of the vertical shafts 19, 55, is in motion, the other is at rest, and each of said gear-arms is timed to impart a one-half revolution to the relative pinion.

Reciprocativein the standards 17 and 40 are spring-controlled latches 56, 57, respectively. The latch 56 is for alternate engagement with diametrically opposite notches in the hub of the pinion 53, and the latch 57 is for alternate engagement with diametrically opposite notches in-the hub of the pinion 54, said latches serving as stops to prevent overrunning of the shafts 19 and 55.

Centrally secured on the upper end of the shaft 55, rigid therewith, is a crosshead 58 provided with an upper central fin 59 transversely thereof, and the cross head is also provided with suitably spaced countersunk apertures in series in opposite directions from said fin. Extending through an aperture of each series in the crosshead is a pin 60, and the two pins are always to be set equi-distant from the axial center of said crosshead, said pins being held in their adjusted positions by supporting plates 61 pivoted to the underside of said crosshead.

The disposition of the crosshead and pins therewith is such that said pins are alternately engaged with an underside groove of the slide-carrier to impart rotary motion to said carrier each time the shaft 55 makes a half turn. By adjustment of the pins in the crosshead, the extent of the intermittent partial rotation of the slide-carrier is determined, and, the central transverse fin 59 of the current supply to the motor being the fin of the the traveler a lantern slide is moved from and returned to original position during the time said carrier is at rest, said slide being caught for a time between a depending finger and the stop rib of said traveler. Im-

mediately upon the return of a slide from the guides therefor on the lantern to the registering space in the carrier, there is automatic movement on the part of said car-, rier to bring another slide in position'to be reciprocated as aforesaid.

the carrier to in front of the'lantern back 4 of the projecting lenses of the stereopticon The slide-carrier is schemed for an arbitrary number of slides, the spaces for which may be registered one'by one with the guides on the lantern, or there may be a skip of one or two of said spaces past said guides according to the disposition of the pins of the intermittently rotary crosshead.

The organization of the apparatus as herein shown is such that the permanent slide or shutter is exposed for a brief time 1 between the lantern and lens of the stereopticon when a lantern slide has been moved back from the guides on said lantern into the slide-carrier, but provision for the employment of a permanent slide or shutter is not absolutely necessary. I claim:

1. In combination with the slide-guides of a stereopticon lantern, prising a grooved at regular intervals upon its upper side together with a conical crown of less base diameter than the plate upon which it' a slide-carrier com: horizontally circular plate radially is centered to turn therewith and which is provided with wall-slots matching with said plate-grooves, means for lmparting intermittent rotary motion to the carrier, whereby slides therewith are successively registered with said guides; and means by which automatic reciprocation is had of a slide in the carrier and guides during a period of rest on the part of said carrier.

2. In combination with the slide-guides of a stereopticon lantern, aicircular horizontally disposed slide-carrier, means for imparting intermediate rotary motion to the carrier whereby slides therewith are successively registered with said guides; a shaft extending above the carrier centrally of the same and provided with an upper crank, a

slide-traveler, a guide for the traveler secured tosaid lantern and supported on a bearing for said shaft, a pitman in connec-' 3. I11 combination With the slide-guides for a stereopticon-lantern, a rotatable slidecarrier comprising a horizontal circular plate having underside grooves at regular intervals thereof, a shaft having an upper crosshead provided with a pair of pro ections longitudinally thereof equi-distantfrom its axial center, means for imparting intermittent rotary motion to sald shaft, whereby the projections of the crosshead are alternately engaged with said plate-grooves to transmit said motion to the carrier and thus register a slide therein with said guides, and means by which automatic reciprocation is had of said slide in said carrier and guides during a period of rest on the part of the carrier.

l. In combination with theslide-guides of a stereopticon-lantern, a rotatable slide-car rier comprising a horizontal circular plate having underside grooves at regular intervals thereof, a shaft having an upper crosshead provided with a center upper fin and a pair of projections, these projections being equi-distant in opposite directions from the lin, means for imparting intermittent ro tary motion'to said shaft, whereby said fin is moved in and out of said plate-grooves and said projections alternately engaged with said grooves to transmit said motion to the carrier and thus register a slide there .m with sald guides, and means by which automatic reciprocation is had of said slide in said carrier and guides.

In combination with the slide-guides of a stereopticon-lantern, a rotatable slide-carrier comprising a horizontal circular plate having underside grooves at regular intervals thereof, a shafthaving an upper crosshead, a pair of pins adjustable in the crosshead to stand equidistant from its axial center, means for imparting intermittent rotary motion to the shaft, 'whereby the pins of the crosshead are alternately engaged with said plate grooves to transmit said motion to the carrier and thus register a slide.

therein with said guides, the degree of movement of the carrier being variable according to the adjustment of said pins; and means by which automatic reciprocation is. had of said slide in said carrier and guides during a period of rest ,on the part'of the carrier.

6. In a stereopticon slide-changing appa-- ratus. a slide-traveler comprising a bar having :1 depending end finger and a depending web at a suitable distance from the finger, the web being provided with an inner slide stop.

' axial center as said shaft, a crosshead shaft having a pinion fast thereon, another geararm extending from said arbor and operative on the pinion of the crosshead shaft in the interval between operations of the pa ired gear-arms on the pinion of the crankshaft, a slide-traveler in pitman connection with the crank-shaft, and a rotatable slidecarrier to which motion is transmitted from the crosshead shaft.

9. In a stereopticon slide-changing apparatus, a standard, a crank-shaft for which the shaft is provided with bearings, a pinion fast on the shaft, a driven arbor provided with a pair of gear-arms engageable with the pinion, aslide-carrier having the same axial center as said shaft, a crosshead shaft having a pinion fast thereon, another geararm extending from said arbor and operative on the pinion of the crosshead shaft in the interval between operations of the paired gear-arms on the pinion of the crankshaft, a slide-traveler in pitman connection with the crank-shaft, a rotatable slide-carrier to which motion is transmitted from the crosshead shaft, and spring-controlled reciprocative latches engageable with hubs of the pinions.

10. In a stereopticon slide-changing appa- 'atus, a standard, a crank-shaft for which the shaft is provided with bearings, a pinion fast on the shaft, an electric motor, an arbor in gear with the motor and provided with a pair of gear-arms engageable with the pinion, a slide-carrier having the same axial center as said shaft, a crosshead shaft having a pinion fast thereon, another gear-arm extending from said arbor and operative on the pinion of the crosshead shaftin the interval between operations of the paired gear-arms on the pinion of the crank-shaft,

a slide-traveler in pitman connection with.

which it is centered, the wall 01 the crown being slotted to match the plate-grooves, and means for imparting intermittent 1'0- tu'ryhnotion to the aforesaid plate and crown 5 therewith.

have hereunto set my hand at Milwaukee in y In testimony cousin in the presence of two Witnesses \VALTER M.-FISCHBAGH. Y Witne ssesi 1 I N. 'E. OLIPHANT; M. E. DOWNEY.

that'I claim the foregoing I the county of Milwaukee and State of Wis- 

